2 slur-engraver.cc -- implement Slur_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
10 #include "note-column.hh"
12 #include "directional-element-interface.hh"
13 #include "engraver.hh"
19 It is possible that a slur starts and ends on the same note. At
20 least, it is for phrasing slurs: a note can be both beginning and
23 class Slur_engraver : public Engraver
25 Drul_array<Music *> events_;
26 Music *running_slur_start_;
27 Link_array<Grob> slurs_;
28 Link_array<Grob> end_slurs_;
30 void set_melisma (bool);
33 virtual bool try_music (Music *);
35 DECLARE_ACKNOWLEDGER (accidental);
36 DECLARE_ACKNOWLEDGER (dynamic_line_spanner);
37 DECLARE_ACKNOWLEDGER (fingering);
38 DECLARE_ACKNOWLEDGER (note_column);
39 DECLARE_ACKNOWLEDGER (script);
40 DECLARE_ACKNOWLEDGER (text_script);
41 DECLARE_ACKNOWLEDGER (tie);
42 DECLARE_ACKNOWLEDGER (tuplet_number);
43 void acknowledge_extra_object (Grob_info);
44 void stop_translation_timestep ();
45 virtual void finalize ();
46 void process_music ();
49 TRANSLATOR_DECLARATIONS (Slur_engraver);
52 Slur_engraver::Slur_engraver ()
54 events_[START] = events_[STOP] = 0;
58 Slur_engraver::try_music (Music *m)
60 if (m->is_mus_type ("slur-event"))
62 Direction d = to_dir (m->get_property ("span-direction"));
78 Slur_engraver::set_melisma (bool m)
80 context ()->set_property ("slurMelismaBusy", m ? SCM_BOOL_T : SCM_BOOL_F);
84 Slur_engraver::acknowledge_note_column (Grob_info info)
86 Grob *e = info.grob ();
87 for (int i = slurs_.size (); i--;)
88 Slur::add_column (slurs_[i], e);
89 for (int i = end_slurs_.size (); i--;)
90 Slur::add_column (end_slurs_[i], e);
94 Slur_engraver::acknowledge_extra_object (Grob_info info)
96 Grob *e = info.grob ();
97 SCM avoid = e->get_property ("avoid-slur");
98 if (Tie::has_interface (e)
99 || avoid == ly_symbol2scm ("inside"))
101 for (int i = slurs_.size (); i--;)
102 Slur::add_extra_encompass (slurs_[i], e);
103 for (int i = end_slurs_.size (); i--;)
104 Slur::add_extra_encompass (end_slurs_[i], e);
106 else if ((avoid == ly_symbol2scm ("outside")
107 || avoid == ly_symbol2scm ("around"))
108 && e->name () != "DynamicText")
110 Grob *slur = slurs_.size () ? slurs_[0] : 0;
111 slur = (end_slurs_.size () && !slur)
112 ? end_slurs_[0] : slur;
116 chain_offset_callback (e, Slur::outside_slur_callback_proc, Y_AXIS);
117 e->set_object ("slur", slur->self_scm ());
121 e->warning ("Ignoring grob for slur. avoid-slur not set?");
125 Slur_engraver::acknowledge_accidental (Grob_info info)
127 acknowledge_extra_object (info);
131 Slur_engraver::acknowledge_dynamic_line_spanner (Grob_info info)
133 acknowledge_extra_object (info);
137 Slur_engraver::acknowledge_fingering (Grob_info info)
139 acknowledge_extra_object (info);
143 Slur_engraver::acknowledge_tuplet_number (Grob_info info)
145 acknowledge_extra_object (info);
150 Slur_engraver::acknowledge_script (Grob_info info)
152 acknowledge_extra_object (info);
156 Slur_engraver::acknowledge_text_script (Grob_info info)
158 acknowledge_extra_object (info);
162 Slur_engraver::acknowledge_tie (Grob_info info)
164 acknowledge_extra_object (info);
168 Slur_engraver::finalize ()
171 slurs_[0]->warning (_ ("unterminated slur"));
175 Slur_engraver::process_music ()
179 if (slurs_.size () == 0)
180 events_[STOP]->origin ()->warning (_ ("can't end slur"));
186 if (events_[START] && slurs_.is_empty ())
188 Music *ev = events_[START];
190 bool double_slurs = to_boolean (get_property ("doubleSlurs"));
192 Grob *slur = make_spanner ("Slur", events_[START]->self_scm ());
193 Direction updown = to_dir (ev->get_property ("direction"));
194 if (updown && !double_slurs)
195 set_grob_direction (slur, updown);
201 set_grob_direction (slur, DOWN);
202 slur = make_spanner ("Slur", events_[START]->self_scm ());
203 set_grob_direction (slur, UP);
207 set_melisma (slurs_.size ());
211 Slur_engraver::stop_translation_timestep ()
214 events_[START] = events_[STOP] = 0;
217 #include "translator.icc"
219 ADD_ACKNOWLEDGER (Slur_engraver, accidental);
220 ADD_ACKNOWLEDGER (Slur_engraver, dynamic_line_spanner);
221 ADD_ACKNOWLEDGER (Slur_engraver, fingering);
222 ADD_ACKNOWLEDGER (Slur_engraver, note_column);
223 ADD_ACKNOWLEDGER (Slur_engraver, script);
224 ADD_ACKNOWLEDGER (Slur_engraver, text_script);
225 ADD_ACKNOWLEDGER (Slur_engraver, tie);
226 ADD_ACKNOWLEDGER (Slur_engraver, tuplet_number);
227 ADD_TRANSLATOR (Slur_engraver,
228 /* doc */ "Build slur grobs from slur events",
230 /* accept */ "slur-event",
231 /* read */ "slurMelismaBusy doubleSlurs",